<template>
  <!-- 工作日历 -->
  <div>
    <el-row>
      <el-select v-model="currentYear" size="small" style="width:120px" @change="dateChange">
        <el-option v-for="item in yearList" :key="item" :label="item" :value="item" />
      </el-select>
      <el-select v-model="currentMonth" size="small" style="width:120px;margin: left 10px;" @change="dateChange">
        <el-option v-for="item in 12" :key="item" :label="item" :value="item" />
      </el-select>
    </el-row>
    <el-calendar v-model="currentDate">
      <template v-slot:dateCell="{date,data}">
        <!-- date是当前单元格日期 data是对象，对象里有要显示的day -->
        <div class="date-content">
          <span class="text"> {{ data.day | getDay }}</span>
          <span v-if="isWeek(date)" class="rest">休</span>
        </div>
      </template>
    </el-calendar>
  </div>
</template>

<script>
export default {
  filters: {
    getDay(value) {
      const day = value.split('-')[2] // ['2020','10','8']
      return day.startsWith('0') ? day.substring(1) : day
    //   startsWith() 方法用来判断当前字符串是否以另外一个给定的子字符串开头，并根据判断结果返回 true 或 false
    }
  },
  props: {
    startDate: {
      type: Date,
      default: () => new Date()// 如果没有传递startDate,就获取当前时间
    }
  },
  data() {
    return {
      currentMonth: null, // 当前月份
      currentYear: null, // 当前年份
      currentDate: null,
      yearList: []// 要便利的年的数组
    }
  }, created() {
    this.currentYear = this.startDate.getFullYear()// 得到当前年份
    this.currentMonth = this.startDate.getMonth() + 1// 得到当前月份
    this.yearList = Array.from(Array(11), (item, index) => {
      return index + this.currentYear - 5
    })
  },
  methods: {
    dateChange() {
      // 生成新的日期
      this.currentDate = new Date(`${this.currentYear}-${this.currentMonth}-1`)
    },
    isWeek(date) {
      // getDay判断是否是周六周日
      return date.getDay() === 6 || date.getDay() === 0
    }
  }
}
</script>

<style scoped>
/deep/ .el-calendar-day {
 height:  auto;
}
/deep/ .el-calendar-table__row td,/deep/ .el-calendar-table tr td:first-child,  /deep/ .el-calendar-table__row td.prev{
 border:none;
}
.date-content {
 height: 40px;
 text-align: center;
 line-height: 40px;
 font-size: 14px;
}
.date-content .rest {
 color: #fff;
 border-radius: 50%;
 background: rgb(250, 124, 77);
 width: 20px;
 height: 20px;
 line-height: 20px;
 display: inline-block;
 font-size: 12px;
 margin-left: 10px;
}
.date-content .text{
 width: 20px;
 height: 20px;
 line-height: 20px;
display: inline-block;

}
/deep/ .el-calendar-table td.is-selected .text{
  background: #409eff;
  color: #fff;
  border-radius: 50%;
}
/deep/ .el-calendar__header {
  display: none
}
</style>

